Attachment for securing grips to bicycle handlebars



April 13,1926.

K. B. HARMON ATTACHMENT FOR SECURING GRIPS TO BICYCLE HANDLEBARS iled Ma20 I 1925 K I INVENTOR 11121412 B flarngon BY Q Q STEL Patented Apr. 13,1926.

KENNETH B. HARMON, OF STOCKTON, CALIFORNIA.

ATTACHMENT FOR SECURING GRIPS TO BICYCLE IIANDLEBARS.

Application filed May 20, 1925.

To all whom it may concern:

Be it known that I, KENNETH B. HAR- MON, a citizen of the United States,residing at Stockton, county of San Joaquin,

State of California, have invented certain new and useful Improvementsin Attachments for Securing Grips to Bicycle Handlebars; and I dodeclare the following to be a full, clear, and exact description of thesame, reference being had to the accompanying drawings, and to thecharacters of reference marked thereon, which form a part of thisapplication.

This invention relates to improvements in means for securing hand-gripsto the common tubular handlebars of bicycles.

These grips are presumed to have a snug lit over the bars and at presentare merely secured thereto by means otsh-ellac or some 519 similaradhesive material.

This proves unsatisfactory since very often the shellac fails to holdafter a time, and the grips come off, especially if they do not fitsnugly over the bars, as is frequently the case.

The principal object of my invention therefore is to eliminate thiscrude method of securing the grips by providing a mechanical fasteningmeans between the grips and the bars, which may be applied to any typeof grips and so constructed that the grips will be securely held to thebars, while at the same time said grips may be easily removed when it isnecessary to renew the same.

The attachment, when applied to the grips and bars, is for the most partconcealed, and the portion visible does not in any way detract from thedesired neat appearance or interfere with the hands using the grips.

A further object of the invention is to produce a simple and inexpensivedevice and yet one which will be exceedingly eli'ective for the purposefor which it is designed.

These objects I accomplish by means of such structure and relativearrangement of parts as will fullyv appear by a perusal of the followingspecification and claims.

In the drawings similar characters of ref erence indicate correspondingparts in the several views:

Fig. 1 is a sectional elevation of a grip of a certain type as appliedto a handlebar showing my holding attachment installed in connectiontherewith.

Serial No. 31,529.

Fig. 2 is a similar view showing the attachment applied to another formof grip.

Fig. 3 is a side elevation of the attach-*' ment alone. 7 I

Referring now more particularly to the characters of reference on thedrawings, the numeral 1 denotes a tubular handlebar, openatits ends asis customary. Adapted to fit onto each end of thebar is a sleevelikegrip 2, whose outer end has a transverse wall 3. The grip shown in Fig.1 is of rubber and that in Fig. 2 of wood,both forms being standard andcommonly used.

To apply my holding attachment to such grips the only change necessaryis to drill a centrally located hole 4 through the wall 3.

My attachment comprises a screw 50f sufficient length to extend throughthe hole 1 and into the bar 1 for. some distance.

The outer end of the screw'prel erably has a round head 6 provided witha screw slot, a washer 7 being placed on thelscrew adj acent the head tofit the contour of and abut against the outer end of the grip to preventthe screw head from cutting into the same.

Freely mounted on the screw is a rigid sleeve 8 to fit the orifice 4E,and of a length to extend from the washer 7 to a point some distanceinwardly of the adjacent end of the bar 1.

A flexible rubber cylinder or block 9 is located on the screw beyond thesleeve 8, the normal diameterof said block being such that it will slideinto the bar 1. Washers 10 are disposed on the screw on both sides ofsaid block, the washers being somewhat smaller in diameter than theblock.

One of these washers is disposed between the block and the sleeve 8, andthe other between the block and a nut 11 on the screw. To install theattachment the parts are first assembled on the grip, so that said partsare close to each other without actually compressing the block. The gripis then placed over the bar in the usual man ner, the block sliding intothe bar. If the screw is then turned by a screw-driver applied to thehead 6, the screw will be ad vanced through the nut, causing the latterto firmly press against the adjacent washers' 10. Since the sleeve 8 isrigid, the block 9 cannot move lengthwise of the screw, and hence willbe compressed between the washers 10. This compression will of coursecause the expansion of the block about its circumference, and cause thesame to frictionally engage the bore of the bar.

The grip is therefore securely held against undesired removal, while aretractive movement of the screw will relieve the compression on theblock and cause the same to slack away from the bar. The grip may thenbe removed together with the attachment by simply drawing the sameoutwardly from the bar.

From the foregoing description it will be readily seen that I haveproduced such a device as substantially fulfills the objects of theinvention as set forth herein.

lVhile this specification sets forth in detail the present and preferredconstruction of the device, still in practice such deviations from suchdetail may be resorted to as do not form a departure from the spirit ofthe invention as defined by the appended claims.

Having thus described my invention what I claim as new and useful anddesire to secure by Letters Patent is:

1. A device for securing a grip to a hollow handle bar including anexpansible block adapted to be inserted into the bar, a headed screwadapted to project through the outer end of the grip and through theblock, a rigid sleeve on the screw between the head of the screw and theblock, and a nut on the screw beyond the block.

2. A device for securing a grip to a hollow handle bar including anexpansible block adapted to be inserted into the bar, a headed screwadapted to project through the outer end of the grip and through theblock, a rigid sleeve on the screw between the head of the screw and theblock, a nut on the screw beyond the block, and washers of not greaterdiameter than the block disposed on the screw between the sleeve andblock and between the latter and the nut, whereby upon the advancing ofthe screw through the nut the block will be com pressed in alongitudinal direction and caused to expand 'circumterentially.

8. A device for securing a grip to a hollow handlebar including anexpansible member adapted to be inserted into the bar means forexpanding said member to cause the sai'ne to frictionally engage thebar, and means associated with said expanding means independent of thegrip for preventing such operation from tending to compress the grip.

i. A device for securing a grip to a hollow handle bar including a blockto fit the bore of the bar, said block being expansible when compressedaxially, rigid members dis posed against the opposite faces of theblock, and means operable from the outer end of the grip and connectedthereto and to the block for moving said members toward each other toexpand the block.

In testimony whereof I affix my signature.

KENNETH B. HARMON.

